1 Of
or in or belonging to the cavity of the abdomen (US spelling) (6)4 The ---, female vocal trio comprising Diana Ross, Mary Wilson and Florence
Ballard (8)8 Invest with ministerial or priestly authority (6)9 Author and creator of the character Dr. Finlay (1,1, 6)10 London street; croquet-like game (4,4)11 Wine from the Jerez region of southern Spain (6)12 Fish; atomic submarine in a children's programme - captained by Troy
Tempest (8)13 Sean ---, Irish author of Juno and the Paycock (1924) (1'5)15 Pandemonium, an uproar (6)18 Capital of South Australia (8)20 A plane curve traced by a point circling about the centre but at
ever-greater distances from it (6)21 Play by Aristophanes, c 405 BC (3,5)23 Or The Peer and the Peri, operetta by Gilbert and Suillivan (8)24 Town near Dounreay (6)25 Sea-nymphs in Greek mythology (8)26 Greek goddess of wisdom, etc. (6)

Down

1 Children's
disease; the rump of a horse (5)2 US Open tennis champion 1985-7 (4,5)3 A mythical being that is half man and half horse (7)4 European Footballer of the Year, 1956 (7,8)5 Pablo, cubist painter (7)6 Sacred words or syllables repeated in prayer or meditation (7)7 Winner of the 1985 British Open (5,4)12 --- Coe, winner of the 1980 and 1984 Olympic 1,500 metres races (9)14 Partick Thistle and Scotland goalkeeper (4,5)16 One of the first petrol-driven cars to be marketed, named for its German
inventor, Gottlieb (7)17 Swindled; fined (7)19 Sister of Orestes who murders her mother (7)22 Trademark for a brand of fine English porcelain (5)